✅ SOLVED some kind of round plug/cap?

[DigIron2]

It is heavy and I think it is made of pot metal.It looks like it has a air hole,and I thought it might have went to some kind of lantern because it looks like it has a place for a wick,but I think that piece is solid besides the little groove on top?It is marked 6 or 9 underneath.It looks like it might have plugged or capped something?

 

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[DigIron2]

Now I am kind of wondering if it might of had something to do with a wine/whiskey barrel?

 

[DCMatt]

I don't think they use metal plugs on whiskey or wine barrels.

I suspect it is from an oil drum.

DCMatt

 

[vhs07]

What is the white residue on the side? Look like the calcified stuff I see coming out of my water heater.

 

[Icewing]

looks like an old fuel cell cap to me.

 

[DigIron2]

What is the white residue on the side? Look like the calcified stuff I see coming out of my water heater.

Its just dirt left on it.

 

[DigIron2]

fuel/oil cap.Thanks everyone!